Valve-gear for internal-combustion engines.



J. c. McI NTOSH.

VALVE GEAR FOR INTERNAL COMBUSTION ENGINES. APPLxUAHUN HLED JAN. 16, m3. RENEWED JULY 26, 1917.

1,258,583. 7 I Patented Mar. 5, 1918,

2 SHEETS-SHEET l- I J. c. MclNTOSH. VALVE GEAR FOR INTERNAL COMBUSTION ENGINES APPLICATION FILED JAN- [5, HHS- RENEWED JULY 25' 1917. 1,258,583.

Patented Mar. 5, 1918.

2 SHEETS-SHEET 2.

Q Q O a w im fl R 0 i MCINTOSH, a subject of the King of Great UnI ED STATES PATENT OFFICE.

. JOHN CAMPBELL JICINTOSI I, (IF THE GLEN, BY PAISLEY, SCOTLAND.

VALVE-GEAR FO-R INTERNAL-COMBUSTION ENGINES.

Specification of Letters Patent.

Patented Mar. 5, 1918.

Original application filed December 20, 1909, Serial No.534,168. Divided and this application filed January 16, 191.3, Serial No. 742,357. Renewed July 26, 1917. Serial No. 183,018.

To all whom it mag concern: I 7

Be it known. that I, J OHN CAMPBELL Britain, residing in Glenhall, The Glen, by Paisley, Scotland, have invented certain new and useful Improvements in Valve- Gears for Internal-Combustion Engines, of, which the following is aspecification.

This application relates to .improvements in valves and valve gear for four cycle internal combustion engines and constitutes a division of my- ,copending application Seial Number 534,168 filed ecember 20, 1909. Y

As disclosed-in .iny saidprior application my improved engine comprises two reciprocatingcylindricalvalvc sleeves arranged concentricall Qivitl', the working cylinders and .my present application relates partice 20 valve ularly to the mechanism for operatingsuch vide. a, simple, efficient and easily; accessible mechanism for this p ur'pose A further ob1cct of-the. invent on -18 to provide a a valve nech anis nof this type for multiplev cylinder engines -so .const-ructed. that the valve-.s1eeve's andtheir operating.

devicesof any. one or-inore cylinders maybe 3 easily" removed for examination .or other purposes withoiit disturbing the other cylinders or their. Working parts. In the accompanying,.drawingsform n5 part of this up ication, I have illustrate a preferred em odimcntj of my invention and in the said drawings, v Y

Figure 1 is a vertical sectional view of a single cylinder of a slide valve motor embodying my" 'nvention.

Fig, 7 is plain f ievv of ac-four cylinder motor-e bodying t e same,

Fig.'3 is a side'elevationpartly in section (if-fin: upper part ofthe motor shown in Fig. 4 is a detail view showing the inner sleeve in side a (1 end elevation, and

Fi 5 is a simil ar view of the outer sleeve. Re erring no t like reference- 0 eracters indicate like parts. throughout th several views, A indicates the main shaf mounted in the usual manner in the crank chamber V of the motor. -Each cylinder, S, S of the motor comprises a lower portion having a water jacket R inclosing a liner M which forms the working cylinder of the motor piston N. The inner sleeves'and has for'its 'object to pi-o-. v

K fornied in their adjacent ends-D 1 fl-are-detacliably bolted to thegwater I to hevewater v o the drawings in which wall of the water acket- R is offset from the upper part of the liner M forming an annularcavity U inwhich' the-valve sleeves G and H reciprocate.

the ports 0 'of the liner. Immediately lie-- low the portsO- the liner M is provided Above the. liner M with compression rings Q, and theeyl iiider head provided with similar zri-ng's P Slll'lOllll(lll1%-lt-S lower end, The-Sleeves and H are of just sufficient 10 G" and H to exten P. The pper ends' .of ythe w rmed with ports O ciirrespond-,-,

with the mi-r. jackets -.,R exception cavitiesv along their longitudinal'e jacket are. provided for t iereceptiqnof the valve, sleeve "operating mechanism.l.wliieh will now be described Asshownfiinqre zir- .ticularly inFigXs-Q and 3 thejicafviti'es ofend register with, those fo -ff each cylinder the. adjacent cylinders ,to iorniKipockets Dfland aekets' closed on all fourjsidesandvat. the elidsK i of these pockets'adjacent the central depression of the cylinder heads,.;bea iiiigs C C are provided for the valve operating shaft C which extends across the topsof. the

cylinders along their median longitudinal axis. The shaft C is driven fromthe-n ain shafhA through suitable skew or other gearsA and a vert cal spindle B. The

shaft- C is preferably made up of a plurality of sections, one for each cylinder, joined together by couplings X in line with the abutting ends of the cylinders, and over the pockets K, the ends ofeach shaftsectionare provided with-cranks E, F, to which-are connected therods J, which are'pivoted at their lower ends on trunnions G H formed on upward extensions G H from the opposite sides of the valve sleeves G, H

respectively. The shaft C is completely inclosed by detachable covers K on its upper side and by bridges T beneath, which extend over the central depressions in the cylinder heads in which are provided the sockets L for the usual spark plugs.

For lubricating the valve sleeves the annular cavities U are connected by suitable bores indicated by dotted lines W with the crank case at W. The lubricantmay be fed to the sleeves throughthe bores W' by a suitable force feed or may be fed directly to the cavities U and allowed to drain through. the bores.

For admitting the explosive charge to the cylindm's'the usual induction ports Y, with flanges Y extend through the water jackets in line with the ports (I) on one side and similar exhaust ports, not shown are provided on the opposite side as will be understood.

My improved motor operates on the well. known principle of prior sleeve valve engines, the two'sleeves cooperatin to open the exhaust port on one up stro c of the piston and the intake port on the succeeding down stroke while maintaining both parts closed during the compression-and driving strokes.

The advantages of my improved valve operating gear over prior. Constructions will be obvious from the foregoing description. In the first lace by having the operating shaft across t e top of the motor the operat ing connections are instantly accessible for repairs or adjustment, by simply removing the covers K which may in fact be entirely dispensed with. Secondly, by detaching the cylinder head and couplings X of any cylinder the entire valve mechanism for that cylinder may be removed without disturbing the adjacent cylinders. Furthermore, the pockets formed by the abutting cavities K may be kept full of oil afi'ording perfect lubrication for the parts and the crank case is free of all extraneous parts permitting easy accessibility to the crank shaft connec tions.

Having thus described my invention what I claim as new and. desire to secure by Letters Patent is:

1. In an engine of the class described the combination of a cylinder, a piston working therein, a main shaft operated thereby, a plurality of concentric valve sleeves surrounding said cylinder and having diametrically disposed projections, and means for reciprocating said valve sleeves comprising a shaft at the end of said cylinder opposite from said main shaft and actuating connections between said shaft and each of mid projections whereby opposite sides of said cylinders are moved in unison.

2. In an engine of the class describcd,- -the combination of a plurality of parallel cylinders, pistons working therein, a main 3. in. an engine of the class described, the

com'lgiination of a cylinder head, a piston movable with respect to said cylinder head, a shaft operativcly connected with said piston, a secondary shaft at the combustion end, an inner and outer valve sleeve, connections between each of said sleeves and said secondary shaft, said secondary shaft exposed so as to provide access to said connection.

it. In an engine of the class described the combination of a cylinder head, a piston slidable with respect to said cylinder head, a shaft operatively connected with said piston, a secondary shaft at the combustion end in drivin connection with said first named shaft, va ve sleeves, means for connecting said valve sleeves with said secondary shaft, said means engaging said sleeves on a plurality of points on-the circumference thereof, and a casing for said last named shaft.

5. In an engine of the class described the combination of a cylinder head, a piston movable with respect to said cylinder head, a shaft opcratively connected with said piston, a secondary shaft at the combustion end in driving relation with said first named shaft, valve sleeves, means for connecting said valve sleeves with said secondary shaft, said means engagin said sleeves on a plurality of points on tie circumference thereof, a casing for said last named shaft, and. a casing inclosing said connecting means, said casings being in communication with each other.

6. In an engine of the class described, the combination with a cylinder head, a pair of telescopic valve sleeves surrounding said bylipdcr heacha shaft journaled above said head and extending radially thereof, said shaftprovided with four cranks arranged in pairs on opposite sides of the cylinder head and rods connecting the cranks with the valve sleeves.

In witness whereof, I have hereunto set my hand at Glasgow, Scotland, this 24th day of December, 1912.

J. CAMPBELL McINTO H. 

